CN1100509A - Fluidized bed combustion system having an improved pressure seal - Google Patents
Fluidized bed combustion system having an improved pressure seal Download PDFInfo
- Publication number
- CN1100509A CN1100509A CN94107805A CN94107805A CN1100509A CN 1100509 A CN1100509 A CN 1100509A CN 94107805 A CN94107805 A CN 94107805A CN 94107805 A CN94107805 A CN 94107805A CN 1100509 A CN1100509 A CN 1100509A
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- conduit
- stove
- fluid bed
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- air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/02—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed
- F23C10/04—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone
- F23C10/08—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue gases
- F23C10/10—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue gases the separation apparatus being located outside the combustion chamber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/0007—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus with combustion in a fluidized bed
- F22B31/0084—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus with combustion in a fluidized bed with recirculation of separated solids or with cooling of the bed particles outside the combustion bed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/20—Inlets for fluidisation air, e.g. grids; Bottoms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2206/00—Fluidised bed combustion
- F23C2206/10—Circulating fluidised bed
- F23C2206/103—Cooling recirculating particles
Abstract
A fluidized bed combustion system in which a separator receives a mixture of flue gases and entrained particulate material from a fluidized bed in a furnace. A pressure seal valve, in the form of two ducts, connects an outlet of the separator to the furnace for recycling the separated particulate material back to the furnace. A pressure head builds up in one of the ducts and air is introduced to the other duct to dampen pressure fluctuations in the furnace and promote the flow of the particulate material back to the furnace.
Description
The present invention relates to fluidized bed combustor and method, particularly a kind of like this fluidized bed plant and method, wherein, improved wiper seal is arranged between the hearth portion and separation portion of fluid bed.
Fluidized bed combustor is known, and comprises hearth portion, and wherein air flows through the bed of particulate matter, this particulate matter comprises fossil fuel, such as coal, and the adsorbent that is used for the sulfur dioxide that produces owing to burning of coal so that fluidisation and promote fuel combustion under low temperature relatively.The burner of these forms normally is used for producing steam, wherein water in the heat exchanger relevant with fluid bed through so that produce steam and allow high efficiency of combustion and fuel tolerance, high sulfide absorption and low nitrogen oxides emission.
The typical fluid bed of the great majority that hearth portion adopted in these types of devices is common name so-called " bubble " fluid bed, wherein the bed accessory of particulate matter has the upper surface of high relatively density and clearly demarcated profile, or claim to adopt in other forms of discontinuous this class device a kind of " circulation " fluid bed, wherein the density of fluid bed is the density that is lower than typical bubble fluid bed, fluidization air is equal to or greater than bubble bed, and the flue gas that flows through bed sucks takes away a considerable amount of fine solid particles, and particle is substantially to saturated value scope in the flue gas to reach.
The feature of circulation fluid bed is high relatively inside and outside solids recirculation, and this just makes the hot release mode of its fuel insensitive, therefore, and minimum variations in temperature and make stable sulfide emission in low water-mark.Outer solid recirculation is by being provided with cyclone separator making it admitting flue gas to reach in the hearth portion exit, solid thereby taken away from fluid bed.Isolate solid and flue gas leads to heat recovery area from flue gas in separator, solid then turns back in the burner hearth.This recirculation has improved the efficient of separator, and causes increasing of sulfide sorbent service efficiency, and the fuel stays time has reduced the burning of adsorbent and fuel.
In the circulation fluidized bed plant, it is important with direct the backflowing from the burner hearth to the separator outlet that prevents gas that wiper seal is set between separator and hearth portion, and flue gas is being with solid simultaneously.Aforementioned means has so-called common name " J-valve ", and this J-valve has the U-shaped portion of extending from the vertical immersion portion that separator extends and from immersion portion so that the build-up pressure sealing.No. 5040492 open J-valves of applicant's United States Patent (USP) are applied in the environment of this class type, and this patent transfers the assignee of the present invention.The design of such J-valve is so that make solid height in the immersion portion of valve directly be equivalent to cross the summation that burner hearth falls to the pressure of separator.Yet, in closing blowing out or similar process, when solid matter must be removed from device fully, be very difficult or even impossible in order to get rid of solid from the vertical portion of J-valve.In addition, in order to transport to satisfactorily, these J-valves require high relatively fluidization air pressure, need additional blower fan, and blower fan are expensive.
In order to overcome above-mentioned shortcoming, a kind of " L-valve " invented, and it comprises the horizontal leg that the vertical dipping tube that extends from separator and outlet with vertical leg are connected with hearth portion.United States Patent (USP) 4709662 discloses a kind of L-valve, and it is connected to external heat exchanger the import of burner hearth.This L-valve has vertical leg, and wherein, long-pending the folding to form the material top of solid matter provides wiper seal.Though the advantage of this L-valve is to discharge, just solid can be removed from valve in closing blowing out or similar procedure, and it still is problematic.For example, sealing highly is not the pressure differential that directly equals to cross valve, and to fluctuation is very responsive from the counter-pressure of burner hearth.And additional blower fan is required to keep the fluidization air pressure of a minimum usually in the L-valve.
Therefore, the objective of the invention is to propose a kind of fluidized bed combustor and method, so that it has improved wiper seal between stove (burner hearth) and separator.
A further object of the invention is fluidized bed combustor and the method that proposes a kind of above-mentioned pattern, and wherein wiper seal reaches by means of the valve that can discharge.
Further object of the present invention is the apparatus and method that propose a kind of the above-mentioned type, and wherein, valve moves with low relatively fluidization air pressure, and does not require additional blower fan.
A further object of the invention is the apparatus and method that propose a kind of the above-mentioned type, and wherein, valve is insensitive for the counter-pressure fluctuation from stove (burner hearth).
Further object of the present invention is the wiper seal valve that proposes a kind of the above-mentioned type.
In order to satisfy these purposes and other purpose, the present invention proposes a kind of fluidized bed combustor, and wherein, separator is admitted from the flue gas of fluid bed in the stove (burner hearth) and sucked the particulate matter mixture that carries, and from flue gas separating particular matter.The wiper seal valve is connected to stove (burner hearth) with separator outlet and is used as separated particulate material matter is passed through.Valve can discharge, and its sealing highly is directly to fall with the pressure of crossing device to match, and it also can absorb the back-pressure fluctuation from burner hearth.
The present invention proposes a kind of fluidized bed combustor, and this device comprises: a stove is set up the device of the fluid bed of incendivity particulate matter in described stove; Separator, this separator admit the flue gas from the fluid bed in the described stove to carry the mixture of particulate matter and separate described particulate matter from flue gas with sucking; First conduit that is used for admitting described separated particulate material matter from described separator extension; Described first conduit is connected to second conduit of described stove, and whereby, described particulate matter is deposited in and is used for the build-up pressure sealing in described first conduit, and this wiper seal prevents the backflowing of described particulate matter from described stove to described separator; And the device that is used for setting up fine and close relatively fluid bed and relative thin fluid bed; Pressure oscillation and promotion fuel particle material that this device is used for respectively decaying from stove in described second pipe guide flow through described second pipe guide.
Wherein, described first pipe guide comprises and is roughly vertical conduit, and described second pipe guide comprises the conduit of approximate horizontal.
Wherein, the described device of setting up described fine and close relatively fluid bed and relative thin fluid bed in described second pipe guide comprises the guiding air and enters the device of two parts of described second pipe guide.
Wherein, described air guiding device is directed to air in two parts of described second pipe guide with different speed respectively.
Wherein, described fine and close relatively fluid bed is positioned at contiguous described separator and decays from the pressure oscillation of described stove.
Wherein, described thin relatively fluid bed is positioned at contiguous described stove and promotes described particulate matter to flow to described stove.
Wherein, described air guiding device point to that speed increases on the described stove direction and the guiding air enters described thin fluid bed so that make described thin bed on described direction, become thinner to promote described flowing in described other parts.
Wherein, the part of described at least second conduit is increase described mobile to promote pointing to described stove direction basal area.
Wherein, in described two parts of described second pipe guide, the described separated particulate material matter of described air fluidisation.
Described device, also comprise the heat-exchange device that extends between described second pipe guide and the described stove, be used for admitting described separated particulate material matter, remove heat and make described separating particular matter by arriving described stove from described particulate matter from described second pipe guide.
The present invention also proposes a kind of combustion method, and the step that this method comprises is:
In stove, set up the fluid bed of incendivity particulate matter, the described particulate matter of burning is to form the mixture of flue gas and the particulate matter that carries in described stove, described mixture is passed through from described stove, from described flue gas, separate described particulate matter, make described separated particulate material matter by entering first conduit, make described separated particulate material matter pass through to arrive second conduit from described first conduit, make described separated particulate material matter pass through to arrive described stove from described second conduit, the sealing of the described first conduit build-up pressure is used for preventing described separated particulate material matter from the backflowing of described stove, and in described second conduit, set up fine and close relatively fluid bed with relative thin fluid bed so that decay from the pressure oscillation of stove respectively and promote described separated particulate material matter to pass the mobile of described second conduit.
Wherein, described first conduit roughly vertically extends, and the described second conduit approximate horizontal is extended.
Wherein, the step of setting up fine and close relatively fluid bed and relative thin fluid bed in described second conduit comprises and guides air to enter in two parts of described second conduit.
Wherein, described air is to be directed in two parts of described second conduit with two different speed.
Wherein, the air velocity that the guiding of described air guiding device enters described thin fluid bed increases on the direction of pointing to described stove, so as to make described thin fluid bed on described direction, become more thin make it to promote described mobile.
Wherein, the part of described at least second conduit point to basal area on the direction of described stove be increase to make it to promote described flowing.
Wherein, the described separated particulate material matter of described air fluidisation in described conduit.
Wherein, also be included in before the described step that described particulate matter passes through to described stove, remove the step of heat from described separated particulate material matter.
In conjunction with the accompanying drawings, by according to existing recommendation of the present invention, yet although be the following detailed description of illustrated embodiment, for above-mentioned brief description of the present invention and other purpose, feature and advantage will more fully be understood.
Fig. 1 is the schematic diagram that apparatus of the present invention are described in expression;
Fig. 2 is the cross section view along 2-2 line among Fig. 1;
Fig. 3 is the view along the section amplification of 3-3 line among Fig. 2;
Fig. 4 is the partial enlarged view of device shown in Figure 1;
Fig. 5 is similar to device shown in Figure 1, but is the variant embodiment of apparatus of the present invention.
The fluidized bed combustor of the present invention that accompanying drawing is described is used to produce steam.This device comprises the water-cooled stove of setting, is usually to indicate with label 10, and has antetheca 12, rear wall 14 and two sidewall 16a(Fig. 2), the top of stove 10 is sealed with caping 18, and its underpart comprises base plate 20.
Perforated plate also is the bottom extension that grate 22 is crossed stove 10, and is parallel to base plate 20 extensions, thereby defines a pressure air gas storage portion 24.The air that gas storage portion 24 admits from conduit 26, this conduit itself are connected to air source (and do not show) again.A plurality of vertical nozzle 28 slave plates 22 extend upward, and have the perforation ventilation unit onboard and are used for from gas storage portion 24 air-distribution being entered hearth portion 10.
Feed arrangement (and do not show) is arranged in abutting connection with antetheca 12 places, is used for guiding granular fuel to enter burner hearth, and this point is intelligible.Adsorbent such as lime stone, also can be directed in the burner hearth with similar methods with particle form.Granular fuel and adsorbent by means of when air from gas storage portion 24 by plate 22 make progress by the time be fluidized.This air promotes the burning of the fuel of generation combustion gas, and causes combustion gas and AIR MIXTURES (following common name " flue gas ") to take away the part particulate matter owing to fluidisation being risen and sucking in stove (burner hearth) 10, and this will be described.
Flue gas separated in the separator 30 does not roughly have solid, it passes stand pipe 34 from separator, the part of this stand pipe is extended in separator, being used for admitting the flue gas of separation, and partial fume is transmitted into heat recovery section (and do not show) from the separator that flows through flue gas and makes it further processing.
Pars infundibularis 30b is from the extension of separator bottom and be connected to dipping tube 36, this dipping tube extends downwardly into the level place of the base plate 20 of stove (burner hearth) 10, as illustrated in fig. 1 and 2, carrier pipe 40 is connected the bottom of dipping tube 36 with aperture 14b on rear wall 14 bottoms, carrier pipe 40 is the extension 22a by plate 22, connects the plate 41 of antetheca 36a of burner hearth rear wall 14 and dipping tube 36 and two sidewall 40a and 40b and forms (Fig. 2).Therefore, carrier pipe 40 is transferred to burner hearth 10 with the solid that separates from dipping tube 36, and its function is also in 28 the solids backflow of describing of preventing in some sense from the burner hearth to the dipping tube.
As showing more significantly among Fig. 4 that plate 41 is downward arc-shaped bend from the antetheca 36a of dipping tube 36 towards wall 14a, then upward to wall 14a.This with regard to having formed a downward neck carrier pipe 40 separated into two parts 40a and 40b.Because the arc-shaped bend part that plate 41 makes progress, for described reason, the section of carrier pipe 40 increases on the direction of pointing to burner hearth 10.
Shown in Fig. 2 and 3, antetheca 12, rear wall 14, sidewall 16a and 16b, and define dipping tube 36(and separator 10) and the wall of carrier pipe 40 all be that a plurality of spacer tubes by the continuous fin of tool form, this continuous fin is radially to extend thereby form in a conventional manner airtight partition (making things convenient for pipe by overweening in order to express Fig. 2 and 3) from relative part.
This is intelligible, that is, delivery pipe or similarity piece can combine with plate 22, as the needs from burner hearth 10 pm emission materials.And steam bucket (do not show) is together with a plurality of collector pipes that are located at above-mentioned various water-tube wall termination, and together with downcomer, water pipe or the like is configured to set up the steam that comprises above-mentioned water wall and the flow circuits of water together.Therefore, with the predetermined program that flows through this flow starts back, water flows through and the heat that produced by the burning of the granular fuel in the burner hearth 10 changes into steam and heating steam with water.
Be in operation, granular fuel material and particle adsorbent are directed in the burner hearth 10.Air is directed into the gas storage portion 24 with enough pressure from external source, so as to make air with enough amounts and speed by nozzle 28 so that fluidisation burner hearth 10 in particle.
The set-point burner is used for the fire fuel material, after lighting, by the heat in the burner hearth 10 fuel material is burnt voluntarily, in the different burnings and the stage of reaction, the homogeneous mixture of fuel particle and adsorbate particle forms in burner hearth, and this is referred to as " particulate matter " below mixture.
Flue gas is upward through burner hearth 10 and takes away (or claiming to purify) part particulate matter.Size according to particulate matter is directed to a certain amount of particulate matter in the burner hearth 10, and will be that air is directed to burner hearth inside so that set up fine and close in burner hearth 10 bottoms, set up the liquefied bed of circulation in upper furnace, just, particulate matter is streamed to a certain degree, promptly substantial take away or purify be reached.Therefore, relatively big in the density of the bottom of burner hearth 10 particulate matter, and on the whole length of burner hearth, reduce with height, be roughly constant and be relatively little in upper furnace.At United States Patent (USP) 4,809, this technology is disclosed especially in 623 and 4,809,625, this two patent has transferred assignee of the present invention, the disclosure content combined for referencial use.
The flue gas that flows into burner hearth 10 tops comes down to be full of particulate matter, and outlet opening 14a and conduit 32 by rear wall 14 tops, enters the inlet hole 30a of cyclone separator 30.
In separator 30, particulate matter is separated from flue gas, and latter's (flue gas) arrives recuperation of heat zone or similar portions from separator 30 by conduit (stand pipe) 34.The separated particulate matter that comes from separator is passed down through pars infundibularis 30b and enters dipping tube 36, and enters carrier pipe 40 in the accumulation of dipping tube bottom.Fluidization air be directed and by pipe 48a and 48b enter 44a of gas storage portion and 44b respectively and arrive in the carrier pipe 40 nozzle 50 in case fluidisation at the particulate matter at this place.Guiding enters the air velocity of the 44a of gas storage portion enters the 44b of gas storage portion greater than guiding air velocity, so that thin relatively fluid bed is partly arranged at the 40a of carrier pipe, and fine and close relatively fluid bed is partly arranged at carrier pipe 40b, and the downward neck of carrier pipe 40 is used as two obstructs between the bed.In addition, the air velocity that sprays from the nozzle in carrier pipe 40a 28 is adjustable, so that air velocity progressively increases on from carrier pipe 40b fine and close relatively bed partly to the direction of burner hearth 40.
The pressure head that forms owing to the horizontal plane that is deposited in the particulate matter in the dipping tube 36 has been set up one is enough to prevent that particulate matter from passing the wiper seal of backflowing of carrier pipe 40 to separator 30 from burner hearth 10.Its design determines it is such, that is, the height of particulate matter is equivalent to and along with the pressure from the burner hearth to the separator falls.
The thin relatively bed in the wiper seal downstream in carrier pipe 4a portion absorbs from the pressure pulse of burner hearth 10 and friction compensation loss, thereby promote from dipping tube 36 to burner hearth flowing of 10 particulate matter, and the fine and close relatively bed attenuate pressure wave in the carrier pipe 40b portion is moving.The increase of the cross-sectional area of carrier pipe 40 on the direction of pointing to burner hearth 10 is adapted to the bigger expansion of solid.The bed height of 40a and 40b part is approximately equal to the height of fine and close bed in the burner hearth 10 in the carrier pipe.
Be introduced to and be circulated in the above-mentioned flow circuits with preset program feeding water, feeding water is changed into steam and is heated into superheated steam again making it.
The component that Fig. 5 embodiment is comprised has some identical with the label of Fig. 1 to 4 embodiment indication, is not described further.The external heat exchanger according to Fig. 5 embodiment with label 60 general indications extends between burner hearth 10 and the carrier pipe 40.The antetheca of heat exchanger 60 is formed at the bottom of the rear wall 14 of burner hearth 10, and, with respect to latter's rear wall and the isolated wall 62 that is provided with to form the rear wall of heat exchanger 60.Horizontal top cover 63 connecting walls 14 and 62, the extension 20a of the base plate 20 of burner hearth 10 forms the base plate of heat exchanger 60.The plate 22 of burner hearth 10 also extends to make it to be formed on a gas storage portion 64 between base plate extension 20a and the plate extension 22a.The air that gas storage portion 64 admits from pipe 66, pipe 66 self are connected to external source of air (and do not show) again, and this air source can be for gas storage portion 24 and the 44a of the gas storage portion source of the gas identical with 44b.
The nozzle 68 of a plurality of settings is used for distributing from the ventilation unit of pulling extension 22a and extending upward and have a perforation onboard and enters heat exchanger 60 from the air of gas storage portion 64.(44a of gas storage portion and 44b that attention extends carrier pipe 40 belows are to be positioned at the horizontal plane place that is higher than gas storage portion 24 and 64 and are to be formed by board of keeping apart and base plate, rather than embodiment is such as described above, is formed by the extension of base plate 20 and plate 22).
Open pore 62a be formed on heat exchanger 60 rear walls 62 roughly between the rear wall termination with have between the ventilation unit of carrier pipe 40 ports of export and locate, open pore 14c is formed on the bottom of rear wall 14, inner and burner hearth 40 inside are connected with heat exchanger 60.
What can know is that one or more heat-exchange tube bundles or analog (and do not show) are arranged in the heat exchanger 60 and with the above-mentioned loop that is used for the cold fluid process and are connected, and makes it the heat exchange of the particulate matter introduced relatively.Further describing of heat exchanger 60 is disclosed in United States Patent (USP) 5069170; In 5,069,171 and 5,140,950, all transfer the assignee of the present invention, disclosure is also in conjunction with as a reference.
Except separated particulate material matter flows through carrier pipe 40 from dipping tube 36 in the above described manner, the open pore 62a that passes then on the wall 62 enters outside the heat exchanger 60, and the operation of Fig. 5 embodiment is similar to the operation of Fig. 4 to 5 embodiment.As last three patent disclosures, by means of nozzle 68, the air fluidized particles material that enters heat exchanger 60 inside owing to guiding is cooled particulate matter in heat exchanger 60.The particulate matter of cooling flows through open pore 14c then and enters burner hearth in the back.The position of open pore 14c and 62a is such, promptly, the height of the dense granule material in burner hearth 10 be substantially equal in heat exchanger 60 and carrier pipe 40 in the material height, and the operation of the operation of others Fig. 5 embodiment and Fig. 1 to 4 embodiment is the same.
Two embodiment of the present invention have some advantages, and for example, carrier pipe 40 and dipping tube 36 have been created the wiper seal valve of an on-mechanical formula, and it can prevent particulate matter backflowing from the burner hearth to the separator.The downward neck of carrier pipe 40 can make relatively fine and close and relative thin bed be formed in the carrier pipe, seals to make it build-up pressure, but also allows particulate matter from the dipping tube to the burner hearth 10.Guiding enters the increase of thin relatively interior air velocity in the carrier pipe 40a part, just promotes particulate matter to flow to burner hearth 10 together with the increase towards burner hearth 10 direction rear portion delivery pipe section cross-sectional areas.And carrier pipe 40 also can discharge, and the valve of founding is insensitive to the counter-pressure fluctuation from burner hearth.In addition, do not require that adding blower fan sets up carrier pipe 40a and 40b fluidizing velocity partly.
In some examples of features more of the present invention and in the disclosed content, attempt is done to improve, and changes and replaces and will be used and further feature of no use, and this is intelligible, and accessory claim is explained commodiously and consistent with category of the present invention.
Claims (18)
1, a kind of fluidized bed combustor, this device comprises: a stove is set up the device of the fluid bed of incendivity particulate matter in described stove; Separator, this separator admit the flue gas from the fluid bed in the described stove to carry the mixture of particulate matter and separate described particulate matter from flue gas with sucking; First conduit that is used for admitting described separated particulate material matter from described separator extension; Described first conduit is connected to second conduit of described stove, and whereby, described particulate matter is deposited in and is used for the build-up pressure sealing in described first conduit, and this wiper seal prevents the backflowing of described particulate matter from described stove to described separator; And the device that is used for setting up fine and close relatively fluid bed and relative thin fluid bed; Pressure oscillation and promotion fuel particle material that this device is used for respectively decaying from stove in described second pipe guide flow through described second pipe guide.
2, device according to claim 1, wherein, described first pipe guide comprises and is roughly vertical conduit, and described second pipe guide comprises the conduit of approximate horizontal.
3, install as claimed in claim 1 or 2, wherein, the described device of setting up described fine and close relatively fluid bed and relative thin fluid bed in described second pipe guide comprises the guiding air and enters the device of two parts of described second pipe guide.
4, as device as described in the claim 3, wherein, described air guiding device is directed to air in two parts of described second pipe guide with different speed respectively.
5, as device as described in the claim 4, wherein, described fine and close relatively fluid bed is positioned at contiguous described separator and the decay pressure oscillation from described stove.
6, as device as described in the claim 4, wherein, described thin relatively fluid bed is positioned at contiguous described stove and promotes described particulate matter to flow to described stove.
7, as device as described in the claim 6, wherein, described air guiding device point to that speed increases on the described stove direction and the guiding air enters described thin fluid bed so that make described thin bed on described direction, become thinner to promote described flowing in described other parts.
8, as device as described in the claim 6, wherein, the part of described at least second conduit point to described stove direction basal area be increase to promote described flowing.
9, as device as described in the claim 3, wherein, in described two parts of described second pipe guide, the described separated particulate material matter of described air fluidisation.
10, install according to claim 1, also comprise the heat-exchange device that extends between described second pipe guide and the described stove, be used for admitting described separated particulate material matter, remove heat and make described separating particular matter by arriving described stove from described particulate matter from described second pipe guide.
11, a kind of combustion method, the step that this method comprises is:
In stove, set up the fluid bed of incendivity particulate matter, the described particulate matter of burning is to form the mixture of flue gas and the particulate matter that carries in described stove, described mixture is passed through from described stove, from described flue gas, separate described particulate matter, make described separated particulate material matter by entering first conduit, make described separated particulate material matter pass through to arrive second conduit from described first conduit, make described separated particulate material matter pass through to arrive described stove from described second conduit, the sealing of the described first conduit build-up pressure is used for preventing described separated particulate material matter from the backflowing of described stove, and in described second conduit, set up fine and close relatively fluid bed with relative thin fluid bed so that decay from the pressure oscillation of stove respectively and promote described separated particulate material matter to pass the mobile of described second conduit.
12, as method as described in the claim 11, wherein, described first conduit roughly vertically extends, and the described second conduit approximate horizontal is extended.
13, as method as described in claim 11 or 12, wherein, the step of setting up fine and close relatively fluid bed and relative thin fluid bed in described second conduit comprises and guides air to enter in two parts of described second conduit.
14, as method as described in the claim 13, wherein, described air is to be directed in two parts of described second conduit with two different speed.
15, as method as described in the claim 15, wherein, the air velocity that the guiding of described air guiding device enters described thin fluid bed increases on the direction of pointing to described stove, so as to make described thin fluid bed on described direction, become more thin make it to promote described mobile.
16, as method as described in the claim 15, wherein, the part of described at least second conduit basal area on the direction of pointing to described stove be increase to make it to promote described flowing.
17, as method as described in the claim 13, wherein, the described separated particulate material matter of described air fluidisation in described conduit.
18, as method as described in the claim 11, wherein, also be included in before the described step that described particulate matter passes through to described stove, remove the step of heat from described separated particulate material matter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US089,982 | 1993-07-06 | ||
| US08/089,982 US5347954A (en) | 1993-07-06 | 1993-07-06 | Fluidized bed combustion system having an improved pressure seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1100509A true CN1100509A (en) | 1995-03-22 |
Family
ID=22220526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94107805A Pending CN1100509A (en) | 1993-07-06 | 1994-06-30 | Fluidized bed combustion system having an improved pressure seal |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US5347954A (en) |
| EP (1) | EP0633430B1 (en) |
| JP (1) | JP2717507B2 (en) |
| KR (1) | KR100334685B1 (en) |
| CN (1) | CN1100509A (en) |
| CA (1) | CA2126661A1 (en) |
| ES (1) | ES2124847T3 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5347954A (en) | 1993-07-06 | 1994-09-20 | Foster Wheeler Energy Corporation | Fluidized bed combustion system having an improved pressure seal |
| SE9601393L (en) | 1996-04-12 | 1997-10-13 | Abb Carbon Ab | Procedure for combustion and combustion plant |
| US8434430B2 (en) * | 2009-09-30 | 2013-05-07 | Babcock & Wilcox Power Generation Group, Inc. | In-bed solids control valve |
| US8761943B2 (en) | 2010-01-29 | 2014-06-24 | Alstom Technology Ltd | Control and optimization system and method for chemical looping processes |
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| US5140950A (en) * | 1991-05-15 | 1992-08-25 | Foster Wheeler Energy Corporation | Fluidized bed combustion system and method having an integral recycle heat exchanger with recycle rate control and backflow sealing |
| US5347954A (en) | 1993-07-06 | 1994-09-20 | Foster Wheeler Energy Corporation | Fluidized bed combustion system having an improved pressure seal |
-
1993
- 1993-07-06 US US08/089,982 patent/US5347954A/en not_active Expired - Fee Related
-
1994
- 1994-06-23 EP EP94304574A patent/EP0633430B1/en not_active Expired - Lifetime
- 1994-06-23 ES ES94304574T patent/ES2124847T3/en not_active Expired - Lifetime
- 1994-06-23 CA CA002126661A patent/CA2126661A1/en not_active Abandoned
- 1994-06-30 CN CN94107805A patent/CN1100509A/en active Pending
- 1994-07-05 JP JP6153167A patent/JP2717507B2/en not_active Expired - Fee Related
- 1994-07-06 KR KR1019940016266A patent/KR100334685B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| JP2717507B2 (en) | 1998-02-18 |
| KR960014751A (en) | 1996-05-22 |
| JPH0791612A (en) | 1995-04-04 |
| KR100334685B1 (en) | 2002-11-13 |
| EP0633430A1 (en) | 1995-01-11 |
| CA2126661A1 (en) | 1995-01-07 |
| EP0633430B1 (en) | 1998-12-09 |
| US5347954A (en) | 1994-09-20 |
| ES2124847T3 (en) | 1999-02-16 |
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